Reference Model of LLSVP Morphology
Using depth-dependent clustering analysis of global Vs and Vp tomographic models, we have constructed a new reference model for LLSVP shape and volume. We obtain...[Read More...]
published July 13, 2016
posted in Research
3D Reference Earth Model
REM-3D is a project funded by the National Science Foundation and carried out by Raj Moulik, Ved Lekic, Barbara Romanowicz, and Adam Dziewonski. If you have...[Read More...]
published February 14, 2016
posted in Research
Viscosity increase in the Earth’s mid mantle
Together with collaborators Max Rudolph at Portland State University and Carolina Lithgow-Bertelloni at University College London, we used a novel inversion framework to detect the...[Read More...]
published March 10, 2014
posted in Research
Lithospheric Structure of the Western United States
Using data from the EarthScope Transportable Array, we observed and modeled conversions of S waves to P waves across velocity contrasts within the lithosphere across...[Read More...]
published February 12, 2012
posted in Research
Lithospheric thinning beneath rifted regions of Southern California
Conversions of teleseismic shear (S) waves to compressional (P) waves across velocity interfaces (such as the Moho or the lithosphere-asthenosphere boundary) allow us to map...[Read More...]
published February 12, 2012
posted in Research
Cluster analysis of upper mantle tomography
When cluster analysis is used to classify the profiles of shear velocity (Vs) into N groups whose members are similar, the geographic extents of these...[Read More...]
published February 12, 2012
posted in Research
Full waveform tomography with the spectral element method
Map of lateral variations in the velocity of seismic shear waves (S-waves) at a depth of 125 km. Warm colors denote slower wavespeeds, and are...[Read More...]
published February 12, 2012
posted in Research
Frequency dependence of seismic attenuation
Preferred model (solid line) of frequency dependence of attenuation within the absorption band compared with constraints from laboratory studies (hachured region) and the frequency-independent assumption...[Read More...]
published February 1, 2012
posted in Research
Lithospheric structure beneath continental rifts
Isotropic shear wavespeed variations in the upper mantle from the SEMum model [Lekic and Romanowicz, 2008]. The model is developed using the spectral element method...[Read More...]
Research
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Reference Model of LLSVP Morphology
October 10, 2016 -
July 7, 2016 -
Viscosity increase in the Earth’s mid mantle
February 2, 2016 -
Lithospheric Structure of the Western United States
March 3, 2014 -
Lithospheric thinning beneath rifted regions of Southern California
February 2, 2012
Research
-
Reference Model of LLSVP Morphology
October 10, 2016 -
July 7, 2016
-
Viscosity increase in the Earth’s mid mantle
February 2, 2016